Support re-reading scope variables in protocol and on backed.

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index fed0b2f2f0d27a2a846563fdd74a6f4e7f0a987a..54896b5c0d95f675b386795327f0439b90aaf3f3 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -3022,6 +3022,17 @@
                 ],
                 "hidden": true,
                 "description": "Changes value of variable in a callframe or a closure. Either callframe or function must be specified. Object-based scopes are not supported and must be mutated manually."
+            },
+            {
+                "name": "updateCallFrameScopes",
+                "parameters": [
+                    { "name": "callFrameId", "$ref": "CallFrameId", "description": "Call frame id that scopes must be re-read of." }
+                ],
+                "returns": [
+                    { "name": "scopeChain", "type": "array", "items": { "$ref": "Scope" }, "description": "Scope chain for this call frame." }
+                ],
+                "hidden": true,
+                "description": "Gets a fresh copy of variable scopes of a call frame currently on stack."
             }
         ],
         "events": [